Tire-stripping machine.



c. w. sEELYEf j URE sTRlPPmG MACHINE". v

APLICATION FILED (ICT. 3l. 181].

- Patented Mar. 12:1918.

3 SHEETS-SHEET .3g

prove on t y STATESv PATENT orricn oHanLEs W; STEELE, or AKRON, oHIo, Assieiion To THE EiEEsT-oNE lTTHE at 13.1113131113I y ooMrANY, or aimoimfoHro, A oonronATIoN oE omo.

"Akron, in the county of Summit, State of'r Ohio, have invented certain new and useful Improvements in Tire-Stripping Machines,

of which the Afollowing is a specification..

,The piirplose of this invention is to imat type of machine which was invented by -YVilliamv C. Stevens andpatented January 2, 1917, No.,1211,256, to

which reference should. be Vmade. It has been the object of this invention to improve the valve operating mechanism so that when the operation of stripping a tire is started it could fo1low` automatically without requiring further attention on the part of the operator., It is valso an object to so construct theinachine that it will be impossible for one operation to commence until the'one preceding it has been completed. Thus the machine of the" Stevens atent is made nearly automatic and also foo proof.

These and other objects will appear asthe description proceeds. In the drawings: c

Figure lis a side elevationof a tire strip- A ping machine before the beginning of the stripping operation, a core being shown, in section, 'iii position to be clamped in place. ..-Fig. 2 is a detail of the valve-control on the opposite side of the actuating shaft from that sliownin Fig. 1.

Fig. 3 a

piping between the vvseveral vcylinders showing the arrangement o the variousl control-l j Figa is a cross section through one of the of Fig..

y Thetire stripping machine shown inthe Stevens patent, above referred to, has three distinct operations i'ii The first operation is the clamping of the I .core in position in front of the machine.

lthe tire." Forl each The4 secondy is the'radial extension, of the arms carrying the stripping members. And

thefthirdfis the circumferential movement o-thearins about the core which removes:

' lof these operations there is provided a separate fluid operated cylinplunger diagrammatic view of the j l der 17. The extremity of the gear segment the removal of atire.-

y' -TrnE-sTHxrrING MACHINE,

specmcationof Leiters Patent. Patentd Mar. 12, 1918.

Appii'cafionnied'octdb'e; 31,1917. serial110.199,59?.

der, each cylinder beingconnected by siiitable piping with a central operating valve,

there being interposed in the connection with each cylinder a control valve which is opened on completion of the o eration just preceding the one which is perEJrmed-by its particular cylinder. l The machine comprisesa base 1 on the upper surface of which is secured a vertical standard 4. In the upper end of the standard is pivotally mounted a rocking arm 6 carrying at its outer end a movin grip or clamp 5, which is raised toclampt le c ore-fg.'

in position. rThe rear end .ofV vthe coreclamping armjis pivoted to the plunger 8 of a fluid operated cylinder 9, which is in turn pivoted on a bracket 10 at the rear of 4the base. When the cylinder 9 is charged with Y its operating fluid, preferably air, the plunger will lbe Withdrawn, the outer eiid of the arm Yraised and the core clamped linto position. Thisis the first movement of the machine.

T he base of the'machine is formed with an integral web 11 from which extendsv a pair of parallel brackets, one of' which is l shown at 12, inthe' outer ends/of which is 'rotatably mounted a shaft 13, which may be described as the valve actuating shaft. This shaft carriesal segmental gear 14, the teeth of which are in mcsliwith a horizontal reciprocatingf` rack 15 carried by the of the second fluid operated'cylncarries, by means' of a ball and socket joint 21, a pair of tire stripping arms 2O which `carry at their extremities` suitable tire removing fingers or rollers. As fluid pressure is admitted to the cylinder 17 the rack 1'5 is moved foi-Ward rockingv the gear segment which vadvances the strippingarms 20 This is the second movement of the machine'.

The third and last movement is lthe spreading of lthe arms, or their movement over the core v"which serves to peel the ytire from the core. This action Will be better understood by reference to the? Stevens-pat- 'radially of the core along guideways 24;".

ent. --For the purpose of the present application it will bei'suticientv to Ystate thattthev arms or guides 24- are carried on arcuate j racks formed with gear teeth on their rearsurfaces which' engage bevel gears 31 carried ondaJ transverse shaft 30. The, shaft 30 carries a -pinion 33 Ywhichmeshes with a .operated by a third cylinder 36. `As the .piston in the cylinder yis raised the arms 'are separated and moved from'their verti- 5 cal position, around the core, and strip the The operation of the various cylinders is mntrolled by thesingle operating valve, 1which is designated by the numeral 38, is

'IQ' .mounted on the front of the machine and` is titaown in Fi 5, 6 and 7 of the drawings. v Fluid -un er pressure is supplied to the `Itri.achine by a main supply pipe 39 which det ers into a valve chamber 40 at the back of [L 'the valve 38. On the sidehof the chamliier o ite the su ly pipe t ere is carrie .a ,fmlgvasble valveplplate 41, throu h which an arcuate slot Q, arrange to allow uid under ressure to pass from the chamber .40 into t e three pressure inlet pipes, 43, 44, 45.` The valve plate41 is carried on a stem 46 rotatably mounted in the valve casing, the stem extending beyond the front of the valve and carrying a handle 47, pro-V 'vided with a pointer 48 traveling over a. marked disk 49 on the front of the valve casing.v 'A spring 50 is arranged in theyf valve chamber and serves to hold the valve late a ainst the front of the valve chamber.

be', e va ve plate is also.; provided with an arcuate groove 51 extending from the front face 'of the plate to a little over half its de th, which groove communicates with a i Mundial groove 52 adapted to register with an exhaust chamber 53. The arcuate groove 51 be brought over any one orall of the 'pipes 54, 55 .or 56. During the'strippin 'of the tire the fluid pressure is introduce into the various operating'cylinders through the chamber and the pipes 43,44 and 45,

f while the opposite sides of the cylinders are in communication with the atmosphere throu the pipes 54, 55 and 56 and the pas- `singels 1, 52, and exhaust chamber 53.

veach of the pipes from the main operating valve 38 to ,the various cylinders there 1s arranlged. a control valve, which is shown in deta' in Fig. 4. The control valve is designated as. a Whole'by the numeral 57 agd is provided with passage 58 and passage 59.` The passage 58 communicates with a chamber 60 at one side of which is al pase 61 leading to the passa e 62. A ballve 63 is arranged norm y to close the passage 61. Amy-pass 64 is alsofarranged 1n the valve casing which is normally closed by a ball-valve 65. [It will be noted that the spring 66 which holds the valve 65 closed is comparatively light so that in case of leak in any line Athe pressure ma be kept up throu h the by-pass. A va ve pin 67 1s slidab mounted in the casing and rests on the va ve 63, the valve being sustained by a heavier 68,

v56 in communication wit cated in the piping, as will be seen from an examination of Fig. 3. f These valve casings are designated in rotation 571,578, 57C, 57D and 57E,4 Each valve in of the valve is arranged to be engaged y a tappet on one of the Operating parts of the machine. The pin of the valve 57 is held depressed 0r' open by a tappet arm 69 located on the actuatingy shaft 13 when the arms 20 are at their lowermost point of travel, as shown in Fig. 1. The valve pin of the valve 57B .normally stands with the valve closed, but it is ar-V t ranged to be engaged by a tappet arm 70 on the end'of the plunger 8, so thatl when the' arm 6 is rocked to the limit 0f its movement 80 `and the core clamped in position the valve 57B will be opened. The in of the valve 57C is normally held open by a tappet arm 71 carried on the shaft- 13 when the shaft is in the position shown in Fig. 1. The valve pin of the valve 57D is normally'clo'sed but 1s arranged to be engaged and opened b` the tappet arm 72, also mounted on the sha 13, when the gear segment is rocked to bring the arms 20 to the upward limit Vof their travel. The pin of the valve 57E is normall held o n by a tappet 73 located on the rac 34 an arrangedto engage the pin of this valve when down or in its normal position. The valve 57^ is located in the line of the 95 pipe 43 which leads from the operating valve to the cylinder 9. The valve 57B is located in the pipe 44 that leads to the cylinder 17. 57" is located in pipe 56 571 in' i 45 and 57E' in pipe 55. 4 p pe 100 The operation of the parts will be best understood from a description of the manner in which a tire is stripped in ,this ma-fY chine. A core with a tire. having been placed in the position shown in Fig. 1, the olperator may move the handle 47 to lace t e pipe 43 only in communication'wit the pressure supply, and thus around one step at a timeA but it 1s possible to move the handle around to the limit, placing all ofthe pipes 43, 44 45 in communication with the y pressure hne, and all of the pipesa,` 55 and y the exhaust, whereupon, because of the'arrangementA of control valves the operations will fllow in regular sequence. Amuming .that the handle has movedto the limit of itsthrow, the p1pe43 is open direct to .the linder 9,the valve 57* being held open if" y the tappet 69, as explained. pipe 44 is closed the valve 57B and the pipe 45 ly 9 the limit of movement of 'the plunger 8A the tappet 70 strikes the pin'of the valve 57B which opens communication between the' source of pressure and the rear end of the cylinder 17 through the pipe 44, the opposite end of lwhich is open to the exhaust throughpipe 55 and valve 57E. As therack advances the shaft 13 is'rocked, the first effectl of which `is to close the valve 57A by removal of the tappet 69, effectively locking air inthe cylinder 9', and the closing of the valve57C `which closes the pipe 56 to the exhaust, thereby insuring that the core will remain elevated during the stripping of the As ,therack 15 continues its forward movement the arms move. outwardly radially and when they have reached the highest point the tappet 72 strikes the pin of the.l

lvalve 457D opening the valve and admitting pressure through the pipe'45 to the lowerv end ofthe cylinder 36, which o crates the rack 34 to perform the third and3 last operation in the stripping, the circumferential or spreading movement of the arms. The first effect ofthe upward movement of the rackl is to lift the tappet 73 from the valvepin of valve-57E, which closes the pipe 55 to the exhaust and holds the rack 15 at the outwardlimit of its travel. In the movelment of therack 34 the pipe 54 connecting the upper `end of the cylinder with the exhaustv is always open. y

When the'rack 34 is at the upward limit of its, movementthe tire is stripped and may be removed fromvthe core. The operator now turns the handle 47 through l180 degrees, throwing all of the lines 43, 44 and n v45 lin communication with the exhaust and all of the lines 54, 55 and 56 in communicationjwith the pressure supply. At this state of the machine, however, the only line open to 'the pressure vis pipe 54, valve 57E closing line55 and lvalve 57.C closing line,56. Of

the now exhaust-lines pipe 45, connecting the lower end of'cylinder 36 with the valve 38, is open.' Pressure is nowl admitted to the cylinder 36 above the piston and the rack descends,a pressure on the opposite side of thevpiston being releasedl through pipe 45 and valve57f.` When the rack 34 reaches its lowermost point the tappet 73 opens the valvel57Eand pressure passes through the g pipe'5'5 to the front end of the cylinder 17 and the rack 15 is withdrawn, pressure passiug'from the rear end through the `pipe 44 and valve 57a to the exhaust. As the shaft 13 revolves on the withdrawal ofthe rack 15 the tappet 72 is removed from the valve pin of valve 57D which closes the lme 45 tothe exhaust and locks the rack 34 in its lowermost position. At the limit of the withdrawal ofthe rack 15, whichv moves the 'back to their normal position, the

Tt-applet. 71 strikes'the pin of valve 57" andvtappet 69 the pin of valve' 57A.- Valve 57u belng open,`preurep asses along line 56to the rear fof the cylinder 9 and 'the line 43 is open to the vexhaust; through valve-"57M The rst upward, movement of"the arm' 6 removes the-tappet 70 from the valve 57B,

closing the rear of' thefcylinde'r'l tothe exhaust by wa of pipe 44. The empty core. is now lowere on the floor andthe machine is in condition to receive another core..

It will benoted that by this improved l systemv of control valves andtappet's therefore,` I have made the machine -of the `Ste vens patent absolutely safe and nearly ya'utomatic. It is unnecessaryfor the operator-1' to 'Watch each operation and move the valve at the end of each movement, althoughiit is possible to stop the operation of the ma chine at any point. Also, there is no danger of one operation taking place before the next preceding operation is finished. This improvement may broadly be said to' consist in the provision of'a series of interlocking valve mechanisms on the tire machine.

While Ihave shown the valve which is described jin detail .and illustrated in Fig. 4, such valve is not essential in all of the 1 positions, it being practicable to substitute a one-way valve in all of the positions except 57A, where'v such a valve is lnecessary owing to the possibility of leakage allowing the core to be lowered.

Stripping 3. The combination with.4 a.A tire-stripping machine, wherein the tire-stripping operations take place in sequence, and fluidA operated mechanisms for carrying out said operations of control valves for said mechanisms, and means actuated by said opera; tions for governing said control valves.

4. The combination with a tire-stripping machine, comprising means for holding ia coreof fluid operated mechanism for said core-holding means, a control valve for lsaid fluid operated mechanism, and means overned by the nextfollowing operation o the tire stripping machine for locking said control valve. y

The combination with a tire-stripping machine, comprising means for holding a" core, a control for maintaining said coresaid" control.

i ber over the -8. The combination withV a 4tire strip-V holaiag man ,clamping '0., and

means governed bythe nekt wing operation of the stripping'machine l machine,eompr1s1nga core-clampmg evice e '.restljir v 6. The combination i ing comprising'a coreelampmg .-for actuating 4sai clamping fd'e'vice,' and for mov'tilpgl said tire stripping mem- "ce of theore, a control for said actuating means and a device yon Saidwmeans for movingsaid `tire strippingmember adapted to operate said contro 7. The combination with a tire-strippingmachine, comprising a core clampin device and stripping members, of Hui actuated means for operating said clamping device, and Huid actuated means for moving said tire stripping members over the surface of e core, a source of 'fluid pressure, a valve between said' vsource of pressure and saidmeans for operating said clamping de vice, an arm .carried'by said tire stripping Vmembers normally maintainin said valve open, but movable to close sai valve `when movement of ysaid stripping members commences.

machine, comprising a core clampin revlee and tire-stripping members, of dui actuated means 'for operating said clamping device and Huid actuated means for moving said tire stripping members over the surface'of thecore, a source 'of fiuid preure, a- -SI normally closed valve' betweensaid source of pressure andsaid means vfor moving said ping machine, of a tire stripping member,

i I- tire stripping members, and an arm carried was by said clam ing` device and movable to open saidl v ve upon completion of the movement'of the said core-clamp-device.

9. The combination with a tire-stripping machine, comprising tire strippingy members, means to advance said members t radially-of the core and means to move said members about the periphery of the core, 1Vof a control device actuated by said first mentioned means, permitting said second Y means to operate 4upon completion of the radial movement of the tire stripping mem- 109111@ communion with@ erase-ip- Pins e comprising me Stripping members,- of 'a fluid actuateddevice tov-ad-A vance said members radiallyof thecore and members about the periphery of the core, a

valve between Said source of uid pressure and named 4fluid actuated device, 1 ee an arm operable upon completion of the and tire stri pingl member, :of meansA asecond''luid actuated-'device to move said radial movement of said stripping members 'to open said valve.

" 11. The combination with a ping and members, means to move v said cors-clam ing device and said tire rs, a control-device operupon completion'of the tire stripping movement, permitting said means for movmg said core-clamping device to release said COTE 12. The. combination with a tim-scripping machine, comprising a core-,clampin device and tire stripping members, ofa ilui actuated deviceto operate said tire stripping members and a second Il uid actuated device to .operate said coreclamping device, a

source offluid pressure, a valve between said source of pressure and said second- `named Huid actuated'device, said valve being closed during the operation of said strippingmembers and an arnroperable upon completion of said stripping operations to open said valve tol admit Huid pressure to move ,said clamping means to release said core.

13. The combination with a tire-stripping machine, comprising tire stripping members, means to move said members radially of the core and to move said members about the periphery ofthe core, and means controlled bythe periphery movement of the stripping members, whereby radial movement of the members `may not take place during the peripheral movement.

14. The combination 4with a tire-stripfluid actuated means to move said member radially of the core and second Huid actul `valve only upon completion of sai peripheral movement of said 4tire-stripping mem` bers.

15. In a tire-stripping machine the oom-V bination of means to clamp a core, tire stripmembers, and means' to move said memsad core. and for/movingy the. stripping .members radiali and-perlpherally of the parts of said machine tooperate said valves.

CHARLES w. STEELE.

'110 radially of the core and peripherallyof the core, duid actuated ldevices for'clamping 

